import React, { Component } from 'react'
// 引入action
import { createIncrementAction, createDecrementAction, createIncrementAsyncAction } from '../../redux/count_action'
// 引入connect用于连接UI组件与redux
import { connect } from 'react-redux'


// 定义UI组件
class Count extends Component {
  
  state = {carName: '奔驰c63'}

  // 加法
  increment = () => {
    const { value } = this.selectNumber
    this.props.jia(value*1)
  }

  // 减法
  decrement = () => {
    const { value } = this.selectNumber
    this.props.jian(value*1)
  }

  // 奇数再加
  incrementIfOdd = () => {
    const { value } = this.selectNumber
    if (this.props.count % 2 !== 0) {
      this.props.jia(value*1)
    }
  }

  // 异步加
  incrementAsync = () => {
    const { value } = this.selectNumber
    this.props.jiaAsync(value*1, 500)
  }

  render() {
    return (
      <div>
        <h1>当前求和为： { this.props.count }</h1>
        <select ref={e => this.selectNumber = e}>
          <option value="1">1</option>
          <option value="2">2</option>
          <option value="3">3</option>
        </select>&nbsp;
        <button onClick={this.increment}>+</button>
        <button onClick={this.decrement}>-</button>
        <button onClick={this.incrementIfOdd}>当前求和为奇数再加</button>
        <button onClick={this.incrementAsync}>异步加</button>
      </div>
    )
  }
}

// 使用connect()()创建并暴露一个Count的容器组件
export default connect(
  state => ({count: state}),
  {
    jia:createIncrementAction,
    jian:createDecrementAction,
    jiaAsync:createIncrementAsyncAction
  }
)(Count)